Help with CPU Installation P4T533-C

[Malam]

I just installed a new Intel CPU - P4 3.06/533FSB in my motherboard
P4T533-C. MBM is reporting 1.2 as the speed. I went into the Bios
and can only select a maximum speed of 1200MHZ. The multiplier is
showing 12x and the Vcore is showing 1.2V. I had the motherboard on
jumper free mode and had been using a P4 1.8 /400MHZ before this.

I ran CPU ID and it shows that the CPU is an Intel 3.06G, Internal
Clock -1205.33, System Bus 401.78MHZ, System Clock 100.44MHZ

What else do I need to set-up ? Or have I just purchased a bad CPU ?
Please help.
Thanks.

 

[Paul]

I just installed a new Intel CPU - P4 3.06/533FSB in my motherboard
P4T533-C. MBM is reporting 1.2 as the speed. I went into the Bios
and can only select a maximum speed of 1200MHZ. The multiplier is
showing 12x and the Vcore is showing 1.2V. I had the motherboard on
jumper free mode and had been using a P4 1.8 /400MHZ before this.

I ran CPU ID and it shows that the CPU is an Intel 3.06G, Internal
Clock -1205.33, System Bus 401.78MHZ, System Clock 100.44MHZ

What else do I need to set-up ? Or have I just purchased a bad CPU ?
Please help.
Thanks.

A quick glance in the manual suggest fiddling with "RDRAM/FSB
Frequency Ratio". Maybe that is what is limiting your FSB.
Depending on what speed the RDRAM runs at, the motherboard is
probably trying to avoid overclocking the RDRAM, so it is limiting
the FSB ? (I don't know too much about RDRAM, so that is my guess.)

As for the speed, that is weird. 1200MHz just happens to be the
frequency that a mobile P4 processor runs at (no matter what
speed is stamped on it) when it is plugged into a desktop chipset.
(On desktop motherboards, mobile processors are overclocked by
raising the FSB to extreme levels. The experiments were done over
on the Abxzone.com forums.)

Take the SSPEC, a code like SL726 or SL77P, and look it up on:
http://processorfinder.intel.com

See if it says "Mobile Intel Pentium 4 Processors" at the top of
the resulting page. That means you bought a mobile processor.

Compare what you find, by using the pulldown menu, to look at the
list of normal Pentium 4 processors.

Paul

 

[Malam]

I can't understand why the CPU Frequency multiplier is locked at 12x I
can't change it. It should be around 23x.

 

[Paul]

I can't understand why the CPU Frequency multiplier is locked at 12x I
can't change it. It should be around 23x.

Can you post the SSPEC from the packaging ? It is a code like SLxxx.
From that can be determined whether you have a mobile processor
or not. Post any numbers you can find, in case you cannot find the
five character code for the SSPEC.

If it is not a mobile processor, I have no explanation for why the
multiplier is only 12x.

Paul

 

[Malam]

Thanks Paul:

These are the numbers on the chip:

3.06 GHZ/512/533
L 321B437
M 3Z6B076
8917

I've been on Intel's site and could not find anything on these
numbers. The multiplier is stuck on 12x and the Vcore is still at 1.2

Thanks.

 

[Malam]

I forgot to add that I bought the CPU on the ebay and it came only
with the CPU fan in a plastic container. No Intel package came with
it.

Thanks.

 

[Paul]

I forgot to add that I bought the CPU on the ebay and it came only
with the CPU fan in a plastic container. No Intel package came with
it.

Thanks.

In terms of Mobile processors, there are two types.

Mobile Intel Pentium 4 Processor (heat spreader on top of package)
Mobile Intel Pentium 4 Processor-M (no heat spreader, bare die)

Page 41 of this document has a picture of a Mobile Intel
Pentium 4 Processor. This processor is in a FCPGA2 package,
with a heat spreader on the top.
ftp://download.intel.com/design/mobile/datashts/25302804.pdf

This processor is another mobile device, only it doesn't have a
heat spreader on top. It has a bare die, and is depicted on page 61.
Don't bother to download this one, unless your processor doesn't
have a lid on top of the die. The package is called micro FCPGA.

Mobile Intel Pentium 4 Processor-M
ftp://download.intel.com/design/mobile/datashts/25068607.pdf

Unfortunately, the -M datasheet doesn't show how the device would
be labelled, so I cannot guess as to what fields of numbers might
be on the device.

Which does your processor resemble ? The one with the bare die,
or the one with the heat spreading lid ?

Notice that on page 41 of the first document, there is room for
the five character SSPEC. If your processor has the heat spreader,
you could look up that SLxxx number on processorfinder.intel.com

I still think you have some kind of mobile processor! The trick will
be figuring out exactly what it is.

Oh, try executing this tool, and see what it says the processor is.
http://www.cpuid.com/cpuz.php

(I found the above mobile processor documents on this page:
http://developer.intel.com/design/mobile/documentation.htm )

Paul

 

[Malam]

Thanks. I removed the CPU this afternoon and clean the back properly.
I found some more engraved numbers on the back. I found:
"SL726" . How can this information help me in the installation?
Does this shed any light as to why the multiplier was stuck at 12x?
I have re-installed my old 1.8G and it is running ok. I would like to
know what I need to do to get the 3.06G to run before I install it or
perhaps, I should return it to the seller?

 

[Barry Watzman]

What BIOS version do you have? Reflash the bios to the latest version,
reset all of the setup parameters to their latest values and see if that
fixes the problem.

Otherwise, try to force the physical FSB to 133/533 MHz, and the
multiplier to 23. But none of this should be necessary.

My guess is that you have an old BIOS, but that's just a guess.

 

[Barry Watzman]

You should not be able to change the multiplier, but you are right that
it should be locked at 23 not 12.

 

[Malam]

I have just found out that the CPU is a Mobile P4. This may be reason
why it was not behaving at it should. I am arranging to return it to
the seller who misrepresented the product to me.

Thanks Paul, Barry and all. You guys have been great!

 

[Homer]

The asus web site says you need 1008 bios version and there is a memo in the
column. Follow the link and put in your motherboard and it shows the
supported CPU's

http://www.asus.com/support/cpusupport/cpusupport.aspx

Homer

 

[Paul]

I have just found out that the CPU is a Mobile P4. This may be reason
why it was not behaving at it should. I am arranging to return it to
the seller who misrepresented the product to me.

Thanks Paul, Barry and all. You guys have been great!

There is nothing wrong with that processor, if you combine it with
the right motherboard. For example, some people on Abxzone use
the mobile P4, and change the default 1200/100MHz setting given
at first POST, and they change the CPU clock on their motherboard
to 300MHz. This requires DDR600 memory, if using a 1:1 divider,
or DDR480 with a 5:4 divider. The processor is then running at
300*4=FSB1200. A P4C800 board is the motherboard of choice.
(So, the reason for purchasing a mobile P4, is for extreme
overclocking, and in particular, for creating an extremely
high memory bandwidth. You can get higher processor core
overclocks with a Prescott, but at the expense of much more
heat.)

If a P4 motherboard doesn't have a wide range of CPU clock, then
an ordinary P4 is a better purchase.

Have fun,
Paul

 

[Malam]

Are you saying that I can twik my P4T533C to use this CPU ?

 

[Paul]

Are you saying that I can twik my P4T533C to use this CPU ?

You could change the clock from 100MHz to 133MHz or so,
and depending on the dividers available for the RDRAM, perhaps
a little more is possible, but you won't be able to use
300MHz (FSB1200) with a P4T533C. (Barry can answer the divider
question better than I can.)

An 875P board (like a P4C800 type) is capable of a wide range
of clock speeds. If your P4T533C allowed the clock to go to
133MHz, you will see (133/100) * 1200 = 1.6GHz and that isn't
getting the value from your 3.06GHz processor.

I read about using mobile processors at abxzone.com forums:

http://www.abxzone.com/forums/search.php?searchid=123516
http://www.abxzone.com/forums/showthread.php?t=59931

Either find a normal Northwood processor, or buy another
motherboard. As the P4T533C is a nice board, getting a
normal Northwood is the right answer. A whole new rig
(motherboard and memory) would be a lot of expense
just to use the mobile processor.

Paul

 

[Malam]

Yes, I agree with you. I'll return this CPU on Monday. I'll keep you
posted during the week if anything new comes up. The bottom line is
that I'll have a different CPU probably by the end of next week. Its
going to be a tough war to get the CPU replaced because I bought it
off Ebay but I'm prepared for the war!

 

[Malam]

Update:

I got a brand new retail Intel Pentium 4 3.06/533 this afternoon. It
took a few minutes to install and booted right up at the correct
speed, with the Hyper Threading function turned on by default.

I ran CPUID and here is the result:

Internal Clock 3074.35
System Bus 534.67
System Clock 133.67
Multiplier 23
L2 Cache 512K
L2 Speed 3074.35

MBM Reports the CPU at 3074
VCore 1.552
CPU Temp - on start-up it went to 50 - 55 deg. C and in a few seconds
went down to 39 - 40 deg C.

Only problem that I had was that I was too aggressive at pushing the
CPU Fan clip on the CPU Retention Module on the motherboard and broke
two of the legs. I hope I can find a replacement for this later on.

Once again, you guys were fantastic. Thanks for your generous advice.
I'll be hanging around this group for a long time. there is so much
to learn!

Regards.